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4 Safety, Security, and Contingency Management
Pages 41-46

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From page 41...
... System safety is not only with respect to the vehicles themselves. It includes the safety of the vehicles in the environments in which they will be used, including such things as collision avoidance, contingency management (e.g., to handle Global Positioning System or traffic management outages)
From page 42...
... System safety engineering has never depended exclusively on testing or simulation, so it is surprising that these two approaches are being suggested for advanced aerial mobility and other complex system development today. To handle all the states, even when an enormous number is involved, system safety engineers use modeling and analysis.
From page 43...
... The unique nature of software essentially reduces the software safety problem to the safety of the software requirements provided to the programmers. Showing the consistency of the requirements with their implementation in the software instructions can be handled using standard software engineering approaches.
From page 44...
... Research in cybersecurity for onboard networks and traditional flight software is required to improve automated analysis and test to reduce software and data handling costs. Datalink security will require diversity and redundancy in communication links and new strategies for capturing cutting-edge cryptography strategies into living standards capable of assuring data authenticity despite evolving network attacks.
From page 45...
... At the traffic management level, increased traffic densities, route/mission complexities, and the need for new and novel contingency management necessitate autonomous traffic deconfliction and system-level contingency management. Secure datalink is essential for advanced aerial mobility since voice-based communication has low bandwidth and introduces a multiple-second delay from event occurrence, to announcement on frequency, to comprehension by the human recipient.
From page 46...
... Cyber resilience, the ability for a vehicle or local vehicle group to safely continue a flight operation despite loss or corruption of one or more datalinks or server connections, is an essential component of advanced aerial mobility contingency management. Recommendation: NASA should conduct research, development, and testing of autonomy for contingency management to support safe advanced aerial mobility.

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